CN109275177B - Method, device and system for accessing IAB base station to network - Google Patents

Method, device and system for accessing IAB base station to network Download PDF

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Publication number
CN109275177B
CN109275177B CN201811081256.4A CN201811081256A CN109275177B CN 109275177 B CN109275177 B CN 109275177B CN 201811081256 A CN201811081256 A CN 201811081256A CN 109275177 B CN109275177 B CN 109275177B
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base station
iab
network
gnb
information
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CN109275177A (en
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李小龙
刘永飘
余刚
白天
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CICT Mobile Communication Technology Co Ltd
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Wuhan Hongxin Telecommunication Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point

Abstract

The embodiment of the invention provides a method, a device and a system for accessing an IAB base station to a network, wherein the method comprises the following steps: when the IAB base station is started, the UE is used for carrying out cell selection access to the network, if the IAB base station used as the UE is accessed to the network provided by the gNB base station, the gNB base station acquires the IAB base station information of the adjacent cell, and assists the IAB base station used as the UE to be accessed to the network provided by the IAB base station of the adjacent cell through the acquired adjacent cell IAB base station information, so that the function of the IAB base station can be normally realized after the IAB base station is started. The invention solves the technical problem that the functions of the IAB base station cannot be realized after the IAB base station is accessed to the network provided by the gNB base station in the prior art.

Description

Method, device and system for accessing IAB base station to network
Technical Field
The invention relates to the technical field of 5G NR (New Radio) wireless communication, in particular to a method, a device and a system for accessing an IAB (inter-integrated access node) base station to a network.
Background
Compared with lte (long Term evolution), the 5G NR technology can use a larger bandwidth, for example, a millimeter wave frequency band, and can be applied to a large-scale antenna and a multi-beam system, so that 5G can provide a higher system rate, and provide conditions for developing 5G NR and applying an IAB base station (Integrated Access and Backhaul Integrated base station). The IAB base station is a base station that integrates a wireless access link and a wireless backhaul link, where the wireless access link is a communication link between a UE (User Equipment) and the IAB base station, and the wireless backhaul link is a communication link between the IAB base stations and is used for returning data, so that the IAB base station does not need a wired transmission network to return data. Based on the method, the IAB base station is easier to be deployed in a dense scene, and the burden of deploying a wired transmission network is reduced.
In the prior art, because a 5G gbb base station and an IAB base station exist, the gbb base station does not support integration of access and backhaul, and a backhaul link can only use a wired network, if the IAB base station is started and used as a UE to access the network of the gbb base station, the IAB base station cannot realize its function.
Therefore, in the prior art, the IAB base station has a technical problem that the function of the IAB base station cannot be realized after accessing the network provided by the gNB base station.
Disclosure of Invention
The embodiment of the invention provides a method, a device and a system for accessing an IAB base station to a network, which are used for solving or at least partially solving the technical problem that the function of the IAB base station cannot be realized after the IAB base station is accessed to a network provided by a gNB base station in the prior art.
In order to solve the above technical problem, the present invention provides a method for an IAB base station to access a network, including:
step S1: when an IAB base station to be accessed to a network is started, the IAB base station is used as UE to perform cell selection and access to the network;
step S2: if the network accessed by the IAB base station as the UE is provided by the gNB base station, the gNB base station acquires the information of the IAB base station of the adjacent cell, and assists the IAB base station as the UE to be accessed to the network provided by the IAB base station of the adjacent cell through the acquired information of the IAB base station, so that the IAB base station to be accessed can realize the function of the IAB base station after being started.
In one implementation, step S1 specifically includes:
and the IAB base station to be accessed sends indication information to the access network, wherein the indication information is used for indicating that the accessed UE realizes the function of the IAB base station.
In one implementation, step S2 specifically includes:
step S2.1: when the access network is provided by a gNB base station, sending a first request to a core network through the gNB base station, wherein the first request is used for acquiring IAB donor base station information, so that the core network returns the IAB donor base station information to the gNB base station based on the first request;
step S2.2: the gNB compares the information of the IAB donor base station with the pre-stored information of the adjacent cell to determine whether the adjacent cell has the IAB donor base station;
step S2.3: if the neighbor cell of the gNB base station has the IAB donor base station, acquiring topology information of the IAB donor base station through the gNB base station, and if the neighbor cell of the gNB base station does not have the IAB donor base station, indicating the IAB base station to be accessed as UE access through the gNB base station to perform a detachment operation;
step S2.4: the gNB base station determines an IAB base station existing in an adjacent cell based on the topology information;
step S2.5: the gNB base station is configured as an IAB base station accessed by the UE, and measures the IAB base station existing in the adjacent cell to obtain a measurement result;
step S2.6: and the gNB base station determines a target adjacent cell based on the measurement result, configures the IAB base station to be accessed to switch to the target adjacent cell, or configures the IAB base station to be accessed to attach the gNB base station which is currently accessed, and re-attaches the gNB base station to the target adjacent cell, so that the IAB base station to be accessed is used as UE to access the target adjacent cell, and the function of the IAB base station is realized.
In an implementation manner, in step S2.1, the IAB donor base station included in the IAB donor base station information and the gNB base station belong to the same paging area and tracking area.
In one implementation, the IAB donor base station information includes: ID of IAB donor base station, supported frequencies and public land mobile network.
In one implementation, the neighboring cell includes a plurality of cells, and step S2.2 specifically includes:
and matching the pre-stored adjacent cell information with the obtained IAB donor base station information, and if the matching is successful, determining that the corresponding IAB donor base station exists in the adjacent cell.
In one implementation, step S2.3 specifically includes:
judging whether an Xn interface exists between the gNB base station and the IAB donor base station, and if so, directly requesting the IAB donor base station for topology information through the Xn interface;
and if not, requesting the topology information of the IAB donor base station from the core network through an N1 interface.
In one implementation, directly requesting topology information of an IAB donor base station from the IAB donor base station through the Xn interface includes:
the gNB base station sends a second request to the IAB donor base station through an Xn interface, wherein the second request is used for requesting topology information of the IAB donor base station;
and after receiving the second request, the IAB donor base station sends the topology information of the IAB donor base station to the gNB base station through an Xn interface.
In one implementation, requesting topology information of an IAB donor base station from a core network through an N1 interface includes:
the gNB base station sends a third request to a core network through an N1 interface, wherein the third request is used for requesting topology information of an IAB donor base station, and the third request carries ID information of the IAB donor base station;
after receiving the third request, the IAB donor base station determines a target IAB donor base station according to the ID information of the IAB donor base station carried in the third request, and sends the third request to the target IAB donor base station through an N1 interface;
the target IAB donor sends the topology information to the core network based on the third request;
and after receiving the topology information sent by the target IAB donor base station, the core network sends the topology information to the gNB base station.
In one implementation, the topology information of the IAB donor base station is information of a child node of the IAB donor base station and a child node of the child node, and the information specifically includes an ID of the child node IAB base station, a supported frequency, and a public land mobile network.
In one implementation, the method further comprises: when the access network of the IAB base station to be accessed is provided by the preset IAB base station, the preset IAB base station assists the IAB base station accessed as the UE to realize the function of the IAB base station.
Based on the same inventive concept, a second aspect of the present invention provides an apparatus for an IAB base station to access a network, including:
the cell selection module is used for selecting a cell to be accessed to the network as the UE after the IAB base station to be accessed to the network is started;
and the network access module is used for acquiring the information of the IAB base station of the adjacent cell through the gNB if the network accessed by the IAB base station of the UE is provided by the gNB base station, and assisting the IAB base station of the UE to be accessed to the network provided by the IAB base station of the adjacent cell through the acquired information of the IAB base station of the adjacent cell so as to enable the IAB base station to be accessed to realize the function of the IAB base station after being started.
Based on the same inventive concept, the third aspect of the present invention provides a system for an IAB base station to access a network, comprising: the access network comprises an IAB base station and a gNB base station, wherein the IAB base station is started and used as UE to perform cell selection access to the network, when the access network is provided by the gNB base station, the gNB base station acquires information of the IAB base station of an adjacent cell and assists the IAB base station serving as the UE to access to the network provided by the IAB base station of the adjacent cell through the acquired information of the IAB base station of the adjacent cell, so that the function of the IAB base station to be accessed is realized after the IAB base station to be accessed is started.
One or more technical solutions in the embodiments of the present application have at least one or more of the following technical effects:
in the technical scheme provided by the invention, after the IAB base station is started, the cell selection access network is carried out by taking the IAB base station as the UE, and the network provided by the gNB base station is accessed by the IAB base station as the UE, the gNB base station acquires the information of the IAB base station of the adjacent cell, and then the acquired information of the IAB base station of the adjacent cell assists the IAB base station as the UE to be accessed to the network provided by the IAB base station of the adjacent cell, so that the function of the IAB base station can be normally realized after the IAB base station is started. Therefore, the technical problem that the functions of the IAB base station cannot be realized after the IAB base station is accessed to the network provided by the gNB base station in the method in the prior art is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a flowchart of a method for an IAB base station to access a network according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating an embodiment of assisting an IAB base station to be accessed to access a network through a gNB base station;
FIG. 3 is a diagram illustrating an application of an IAB base station in an embodiment of the present invention;
fig. 4 is a schematic diagram of an IAB base station selecting a cell to access a network according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an apparatus for an IAB base station to access a network according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a system for an IAB base station to access a network according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a method, a device and a system for accessing an IAB base station to a network, which are used for solving the technical problem that the function of the IAB base station cannot be realized after the IAB base station is accessed to the network provided by a gNB base station in the existing method.
The technical scheme in the embodiment of the application has the following general idea:
when the IAB base station is started, the UE is used for carrying out cell selection access to the network, if the IAB base station used as the UE is accessed to the network provided by the gNB base station, the gNB base station acquires the IAB base station information of the adjacent cell, and assists the IAB base station used as the UE to be accessed to the network provided by the IAB base station of the adjacent cell through the acquired adjacent cell IAB base station information, so that the function of the IAB base station can be normally realized after the IAB base station is started.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The embodiment provides a method for an IAB base station to access a network, as shown in fig. 1, the method includes:
step S1: when an IAB base station to be accessed to a network is started, the IAB base station is used as UE to perform cell selection and access to the network;
step S2: if the network accessed by the IAB base station as the UE is provided by the gNB base station, the gNB base station acquires the information of the IAB base station of the adjacent cell, and assists the IAB base station as the UE to be accessed to the network provided by the IAB base station of the adjacent cell through the acquired information of the IAB base station of the adjacent cell, so that the IAB base station to be accessed can realize the function of the IAB base station after being started.
Specifically, the UE is a User Equipment, that is, a User Equipment, and the IAB base station access network is used as the UE access network. Please refer to fig. 3 and fig. 4, wherein fig. 3 is a schematic diagram of an IAB base station application.
The IAB base station provides wireless access and wireless backhaul service of access service for other user equipment. The IAB donor base station (home IAB base station) provides a wireless backhaul function for the IAB base station and provides interfaces of other user equipment and a core network. As can be seen from fig. 1, the IAB donor base station is in wired connection with the core network, there is no wired connection between the IAB base station and the core network, and the IAB base station is connected to the IAB donor base station through a wireless backhaul link, so that other user equipment is connected to the core network.
In addition, if one IAB base station controls and schedules another IAB base station, the IAB base station may be referred to as a parent node, that is, the IAB base station is a parent node of another IAB base station, as shown in fig. 1, the IAB base station 2 may be referred to as a parent node, which is a parent node of the IAB base station 3. An IAB base station may be referred to as a child node if it is under the control of another IAB base station, i.e., the IAB base station is a child node of another IAB base station. As shown in fig. 1, the IAB base station 2, the IAB base station 3, and the IAB base station 4 may all be referred to as child nodes, where the IAB base station 1 and the IAB base station 2 are child nodes of the IAB donor base station, the IAB base station 3 is a child node of the IAB base station 2, and the IAB base station 4 is a child node of the IAB base station 3.
The applicant of the present invention has found through a great deal of practice that:
because there are 5G gbb base stations and IAB base stations, wherein the gbb base stations do not support integration of access and backhaul, and the backhaul link can only use wired network, if the IAB base station is started up as a UE to access the network of the gbb base station, the IAB base station will not be able to implement its function. When a 5G network is deployed, an operator typically deploys a gNB base station and an IAB base station in a certain area according to actual needs and a specific environment. Then, when the IAB base station is started, the serving cell is selected for network access, and the area where the IAB base station is started may be deployed with the IAB base station or with the gNB base station. And the IAB base station can only select the IAB base station to carry out network access, thereby realizing the function of the IAB base station. However, when the IAB base station starts to perform cell selection and access to the network, the IAB base station cannot function because sufficient information cannot be acquired from the network to select a serving IAB base station for cell access. For example, cell selection after the IAB base station is started may directly access the gNB base station. Therefore, the problem of how to access the serving IAB base station after the IAB base station is started needs to be solved, so that the IAB base station can realize the functions thereof.
As shown in fig. 4, a schematic diagram of selecting a serving cell for an IAB base station to access is shown, when the IAB base station 1 is started, the IAB base station 1 is used as a common UE to select an access IAB donor base station according to the signal strength of the cell; when the IAB base station 2 is started, the IAB base station 2 also serves as a general UE to select to access the gNB base station according to the signal strength of the cell. Therefore, after the IAB base station 2 accesses the gNB base station according to the cell signal strength, the function of the IAB base station 2 can be normally realized only by accessing the IAB base station (e.g., the IAB base station 1) with the assistance of the gNB base station.
In this embodiment, the IAB base station information of the neighboring cell may be stored in advance by the gNB base station, or may be acquired by the gNB base station in real time as needed, which is not specifically limited herein. With the help of the gNB base station, the IAB base station to be accessed can be quickly accessed into the network, and the function of the IAB base station can be realized.
In one implementation, step S1 specifically includes:
and the IAB base station of the network to be accessed sends indication information to the access network, wherein the indication information is used for indicating that the accessed UE realizes the function of the IAB base station.
Specifically, the IAB base station to be accessed may notify the access network that it is the IAB base station by sending the indication information, and the function of the IAB base station is to be implemented. In one implementation, referring to fig. 2, step S2 specifically includes:
step S2.1: when the access network is provided by a gNB base station, sending a first request to a core network through the gNB base station, wherein the first request is used for acquiring IAB donor base station information, so that the core network returns the IAB donor base station information to the gNB base station based on the first request;
specifically, the IAB donor base station information may include: ID (identification), supported frequencies and PLMN (Public Land Mobile Network) of the IAB donor base station.
In an implementation manner, the IAB donor base station included in the IAB donor base station information and the gNB base station belong to the same paging area and tracking area.
Specifically, in order to make the IAB donor base station and the gNB base station included in the requested IAB donor base station information belong to the same paging area and tracking area, the area information of the gNB base station may be carried in the first request, so that the core network returns the corresponding IAB donor base station information based on the area information.
Step S2.2: the gNB compares the information of the IAB donor base station with the information of the pre-stored adjacent cell to determine whether the adjacent cell has the IAB donor base station;
specifically, in this embodiment, the neighbor cell information is information pre-stored by the gNB base station, and the pre-stored neighbor cell information may or may not include the IAB donor base station information.
In one implementation, the neighboring cell includes a plurality of cells, and step S2.2 specifically includes:
and matching the pre-stored adjacent cell information with the obtained IAB donor base station information, and if the matching is successful, determining that the corresponding IAB donor base station exists in the adjacent cell.
Specifically, for example, the IAB donor base station information includes the ID of the IAB donor base station, the supported frequency, and the public land mobile network, and matching may be performed according to the priority of each item of information, for example, the ID of the IAB donor base station is first matched, and if the ID matching is successful, the supported frequency and the public land mobile network are further matched, thereby determining which neighboring cells have corresponding IAB donor base stations.
Step S2.3 is performed next: if the neighbor cell of the gNB base station has the IAB donor base station, the gNB base station acquires topology information of the IAB donor base station, and if the neighbor cell of the gNB base station does not have the IAB donor base station, the gNB base station indicates the IAB base station to be processed as UE access to perform the detachment operation.
Specifically, the topology information of the IAB donor base station is the sub-node of the IAB donor base station and the sub-node IAB base station information of the sub-node, and the information specifically includes the ID of the sub-node IAB base station, the supported frequency, and the public land mobile network. By acquiring the topology information of the IAB donor base station, a target IAB base station assisting the IAB base station to be accessed can be selected. When the adjacent cell of the gNB does not have the IAB donor base station, the IAB to be accessed cannot realize the function of the adjacent cell, and the gNB indicates the IAB to be accessed as the UE to perform the detachment operation, namely, the logout operation is performed, and the adjacent cell does not access the network.
In one implementation, step S2.3 specifically includes:
judging whether an Xn interface exists between the gNB base station and the IAB donor base station, and if so, directly requesting the topology information of the IAB donor base station from the IAB donor base station through the Xn interface;
and if not, requesting the topology information of the IAB donor base station from the core network through an N1 interface.
In one implementation, directly requesting topology information of an IAB donor base station from the IAB donor base station through an Xn interface includes:
the gNB base station sends a second request to the IAB donor base station through the Xn interface, wherein the second request is used for requesting topology information of the IAB donor base station;
and after receiving the second request, the IAB donor base station sends the topology information of the IAB donor base station to the gNB base station through the Xn interface.
Specifically, the Xn interface is a communication interface between the gNB base station and the IAB donor base station, and if the Xn interface exists, the Xn interface can be used to directly request the topology information.
In one implementation, requesting topology information of an IAB donor base station from a core network through an N1 interface includes:
the gNB base station sends a third request to the core network through an N1 interface, wherein the third request is used for requesting topology information of the IAB donor base station, and the third request carries ID information of the IAB donor base station;
after receiving the third request, the IAB donor base station determines a target IAB donor base station according to the ID information of the IAB donor base station carried in the third request, and sends the third request to the target IAB donor base station through an N1 interface;
the target IAB donor sends the topology information to the core network based on the third request;
and after receiving the topology information sent by the target IAB donor base station, the core network sends the topology information to the gNB base station.
Specifically, if an Xn interface does not exist between the gNB base station and the IAB donor base station, the gNB base station cannot directly communicate with the IAB donor base station, and needs to pass through the core network. The N1 interface is a communication interface between the gbb base station and the core network. The core network may determine the target IAB donor base station through the ID information of the IAB donor base station carried in the third request, and then forward the third request.
Then step S2.4 is performed: and the gNB base station determines the IAB base station existing in the adjacent cell based on the topology information.
Specifically, the topology information includes the sub-node of the IAB donor base station and the information of the sub-node, so that the neighboring cells meeting the requirement and the IAB base stations corresponding to the neighboring cells can be determined, and there may be a plurality of neighboring cells and IAB base stations meeting the requirement.
Step S2.5 is performed next: and the gNB base station is configured as an IAB base station accessed by the UE, measures the IAB base station in the adjacent cell and obtains the measurement result.
Specifically, the IAB base station in the neighboring cell is measured, and Reference Signal Received Power (RSRP) of the IAB base station may be measured and used as a measurement result, and the measurement result is reported to the gNB base station.
And step S2.6 is executed again: and the gNB base station determines a target adjacent cell based on the measurement result, configures the IAB base station to be accessed to switch to the target adjacent cell, or configures the IAB base station to be accessed to attach the gNB base station which is currently accessed, and re-attaches the gNB base station to the target adjacent cell, so that the IAB base station to be accessed is used as the UE to access the target adjacent cell, and the function of the IAB base station is realized.
Specifically, when the measurement result is the reference signal received power, the gNB base station may determine the target neighboring cell according to the reference signal received power, for example, a cell where the IAB base station with the optimal reference signal received power is located is taken as the target neighboring cell.
In one embodiment, the method further comprises: when the access network of the IAB base station to be accessed to the network is provided by the preset IAB base station, the preset IAB base station assists the IAB base station accessed as the UE to realize the function of the IAB base station. Specifically, when the access network of the IAB base station to be accessed to the network is provided by the preset IAB base station, the IAB base station to be accessed also sends the indication information to the network, and after receiving the indication information, the access network learns that the function of the IAB base station is to be realized and assists the IAB base station accessed as the UE to realize the function of the IAB base station through the preset IAB base station.
After the IAB base station is started and used as the UE to access the network provided by the base station, the IAB base station can be quickly accessed to the network provided by the IAB base station of the adjacent cell after being started by the scheme provided by the embodiment of the invention, so that the function of the IAB base station can be normally realized.
Based on the same inventive concept, the present application further provides a device corresponding to the method for the IAB base station to access the network in the first embodiment, which is described in detail in the second embodiment.
Example two
Referring to fig. 5, the present embodiment provides an apparatus for an IAB base station to access a network, including:
a cell selection module 501, configured to select a cell as a UE to access a network after an IAB base station to be accessed to the network is started;
a network access module 502, configured to, if a network accessed as the IAB base station of the UE is provided by the gNB base station, acquire information of the IAB base station of the neighboring cell through the gNB base station, and assist the IAB base station serving as the UE to access the network provided by the IAB base station of the neighboring cell through the acquired information of the IAB base station of the neighboring cell, so that the IAB base station to be accessed is started to implement the function of the IAB base station.
In an embodiment, the cell selection module 501 is specifically configured to:
and the IAB base station to be accessed sends indication information to the access network, wherein the indication information is used for indicating that the accessed UE realizes the function of the IAB base station.
In an embodiment, the network access module 502 is specifically configured to:
when the access network is provided by a gNB base station, sending a first request to a core network through the gNB base station, wherein the first request is used for acquiring IAB donor base station information, so that the core network returns the IAB donor base station information to the gNB base station based on the first request;
the gNB compares the information of the IAB donor base station with the pre-stored information of the adjacent cell to determine whether the adjacent cell has the IAB donor base station;
if the neighbor cell of the gNB base station has the IAB donor base station, acquiring topology information of the IAB donor base station through the gNB base station, and if the neighbor cell of the gNB base station does not have the IAB donor base station, indicating the IAB base station to be accessed as UE access through the gNB base station to perform a detachment operation;
the gNB base station determines an IAB base station existing in an adjacent cell based on the topology information;
the gNB base station is configured as an IAB base station accessed by the UE, and measures the IAB base station existing in the adjacent cell to obtain a measurement result;
and the gNB base station determines a target adjacent cell based on the measurement result, configures the IAB base station to be accessed to switch to the target adjacent cell, or configures the IAB base station to be accessed to attach the gNB base station which is currently accessed, and re-attaches the gNB base station to the target adjacent cell, so that the IAB base station to be accessed is used as UE to access the target adjacent cell, and the function of the IAB base station is realized.
In an embodiment, the IAB donor base station included in the IAB donor base station information and the gNB base station belong to the same paging area and tracking area.
In one embodiment, the IAB donor base station information includes: ID of IAB donor base station, supported frequencies and public land mobile network.
In an embodiment, the neighboring cell includes a plurality of neighboring cells, and the network access module 502 is specifically configured to:
and matching the pre-stored adjacent cell information with the obtained IAB donor base station information, and if the matching is successful, determining that the corresponding IAB donor base station exists in the adjacent cell.
In an embodiment, the network access module 502 is specifically configured to:
judging whether an Xn interface exists between the gNB base station and the IAB donor base station, and if so, directly requesting the IAB donor base station for topology information through the Xn interface;
and if not, requesting the topology information of the IAB donor base station from the core network through an N1 interface.
In one embodiment, directly requesting topology information of an IAB donor base station from the IAB donor base station through the Xn interface includes:
the gNB base station sends a second request to the IAB donor base station through an Xn interface, wherein the second request is used for requesting topology information of the IAB donor base station;
and after receiving the second request, the IAB donor base station sends the topology information of the IAB donor base station to the gNB base station through an Xn interface.
In one embodiment, requesting topology information of an IAB donor base station from a core network through an N1 interface includes:
the gNB base station sends a third request to a core network through an N1 interface, wherein the third request is used for requesting topology information of an IAB donor base station, and the third request carries ID information of the IAB donor base station;
after receiving the third request, the IAB donor base station determines a target IAB donor base station according to the ID information of the IAB donor base station carried in the third request, and sends the third request to the target IAB donor base station through an N1 interface;
the target IAB donor sends the topology information to the core network based on the third request;
and after receiving the topology information sent by the target IAB donor base station, the core network sends the topology information to the gNB base station.
In an embodiment, the topology information of the IAB donor base station is information of a child node of the IAB donor base station and a child node of the child node, and the information specifically includes an ID of the child node IAB base station, a supported frequency, and a public land mobile network.
In an implementation manner, the apparatus provided in this embodiment further includes an assisting processing module, configured to assist, when an access network of the IAB base station to be accessed to the network is provided by a preset IAB base station, the preset IAB base station to serve as the IAB base station to which the UE accesses, to implement the function of the IAB base station.
Since the apparatus described in the second embodiment of the present invention is an apparatus used for implementing the method for the IAB base station to access the network in the first embodiment of the present invention, based on the method described in the first embodiment of the present invention, those skilled in the art can understand the specific structure and modification of the apparatus, and thus, details are not described herein. All the devices adopted in the method of the first embodiment of the present invention belong to the protection scope of the present invention.
Based on the same inventive concept, the present application further provides a system corresponding to the method for the IAB base station to access the network in the first embodiment, which is described in detail in the third embodiment.
EXAMPLE III
The present embodiment provides a system for an IAB base station to access a network, please refer to fig. 6, which includes: the access network comprises an IAB base station and a gNB base station, wherein the IAB base station is started and used as UE to perform cell selection access to the network, when the access network is provided by the gNB base station, the gNB base station acquires information of the IAB base station of an adjacent cell and assists the IAB base station serving as the UE to access to the network provided by the IAB base station of the adjacent cell through the acquired information of the IAB base station of the adjacent cell, so that the function of the IAB base station to be accessed is realized after the IAB base station to be accessed is started.
Since the system introduced in the third embodiment of the present invention is a system used for implementing the method for the IAB base station to access the network in the first embodiment of the present invention, based on the method introduced in the first embodiment of the present invention, those skilled in the art can understand the specific structure and modification of the system, and thus, details are not described herein. All systems adopted by the method of the first embodiment of the present invention are within the intended protection scope of the present invention.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.

Claims (13)

1. A method for an IAB base station to access a network, the method comprising:
step S1: when an IAB base station to be accessed to a network is started, the IAB base station is used as UE to perform cell selection and access to the network;
step S2: if the network accessed by the IAB base station as the UE is provided by the gNB base station, the gNB base station acquires the information of the IAB base station of the adjacent cell, and assists the IAB base station as the UE to be accessed to the network provided by the IAB base station of the adjacent cell through the acquired information of the IAB base station of the adjacent cell, so that the IAB base station to be accessed can realize the function of the IAB base station after being started.
2. The method according to claim 1, wherein step S1 specifically comprises:
and the IAB base station to be accessed sends indication information to the access network, wherein the indication information is used for indicating that the accessed UE realizes the function of the IAB base station.
3. The method according to claim 1, wherein step S2 specifically comprises:
step S2.1: when the access network is provided by a gNB base station, sending a first request to a core network through the gNB base station, wherein the first request is used for acquiring IAB donor base station information, so that the core network returns the IAB donor base station information to the gNB base station based on the first request;
step S2.2: the gNB compares the information of the IAB donor base station with the pre-stored information of the adjacent cell to determine whether the adjacent cell has the IAB donor base station;
step S2.3: if the neighbor cell of the gNB base station has the IAB donor base station, acquiring topology information of the IAB donor base station through the gNB base station, and if the neighbor cell of the gNB base station does not have the IAB donor base station, indicating the IAB base station serving as the UE to be accessed to the network to perform the detachment operation through the gNB base station;
step S2.4: the gNB base station determines an IAB base station existing in an adjacent cell based on the topology information;
step S2.5: the gNB base station is configured as an IAB base station accessed by the UE, and measures the IAB base station existing in the adjacent cell to obtain a measurement result;
step S2.6: and the gNB base station determines a target adjacent cell based on the measurement result, configures the IAB base station to be accessed to switch to the target adjacent cell, or configures the IAB base station to be accessed to attach the gNB base station which is currently accessed, and re-attaches the gNB base station to the target adjacent cell, so that the IAB base station to be accessed is used as UE to access the target adjacent cell, and the function of the IAB base station is realized.
4. The method of claim 3, wherein in step S2.1, the IAB donor base station included in the IAB donor base station information belongs to the same paging area and tracking area as the gNB base station.
5. The method of claim 1, wherein the IAB donor base station information comprises: ID of IAB donor base station, supported frequencies and public land mobile network.
6. The method according to claim 1, wherein the neighboring cells include a plurality of cells, and step S2.2 specifically includes:
and matching the pre-stored adjacent cell information with the obtained IAB donor base station information, and if the matching is successful, determining that the corresponding IAB donor base station exists in the adjacent cell.
7. The method according to claim 2, characterized in that step S2.3 comprises in particular:
judging whether an Xn interface exists between the gNB base station and the IAB donor base station, and if so, directly requesting the IAB donor base station for topology information through the Xn interface;
and if not, requesting the topology information of the IAB donor base station from the core network through an N1 interface.
8. The method of claim 7, wherein directly requesting topology information of an IAB donor base station from the IAB donor base station over the Xn interface comprises:
the gNB base station sends a second request to the IAB donor base station through an Xn interface, wherein the second request is used for requesting topology information of the IAB donor base station;
and after receiving the second request, the IAB donor base station sends the topology information of the IAB donor base station to the gNB base station through an Xn interface.
9. The method of claim 7, wherein requesting topology information of an IABdonor base station from a core network over an N1 interface comprises:
the gNB base station sends a third request to a core network through an N1 interface, wherein the third request is used for requesting topology information of an IAB donor base station, and the third request carries ID information of the IAB donor base station;
after receiving the third request, the core network determines a target IAB donor base station according to the ID information of the IAB donor base station carried in the third request, and sends the third request to the target IAB donor base station through an N1 interface;
the target IAB donor sends the topology information to the core network based on the third request;
and after receiving the topology information sent by the target IAB donor base station, the core network sends the topology information to the gNB base station.
10. The method of claim 7, wherein the topology information of the IAB donor base station is information of the sub-node of the IAB donor base station and the sub-node of the sub-node, and the information specifically includes the ID of the sub-node IAB base station, the supported frequencies, and the public land mobile network.
11. The method of claim 1, wherein the method further comprises: when the access network of the IAB base station to be accessed is provided by the preset IAB base station, the preset IAB base station assists the IAB base station accessed as the UE to realize the function of the IAB base station.
12. An apparatus for an IAB base station to access a network, comprising:
the cell selection module is used for selecting a cell to be accessed to the network as the UE after the IAB base station to be accessed to the network is started;
and the network access module is used for acquiring the information of the IAB base station of the adjacent cell through the gNB if the network accessed by the IAB base station of the UE is provided by the gNB base station, and assisting the IAB base station of the UE to be accessed to the network provided by the IAB base station of the adjacent cell through the acquired information of the IAB base station of the adjacent cell so as to enable the IAB base station to be accessed to realize the function of the IAB base station after being started.
13. A system for an IAB base station to access a network, comprising: the access network comprises an IAB base station and a gNB base station, wherein the IAB base station is started and used as UE to perform cell selection access to the network, when the access network is provided by the gNB base station, the gNB base station acquires information of the IAB base station of an adjacent cell and assists the IAB base station serving as the UE to access to the network provided by the IAB base station of the adjacent cell through the acquired information of the IAB base station of the adjacent cell, so that the function of the IAB base station to be accessed is realized after the IAB base station to be accessed is started.
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